REMFLEX GASKETS BLOW OUT
It’s too bad people are tearing these gaskets. You can Increase your chances of reusing the Remflex gaskets without tearing them (headers or collector extensions) by just ever so slightly, that means barely cracking loose the bolts so as to only allow parallel movement. On the headers you then grab them down at the collectors and push up and pull down to break them free of the gasket. On the extensions/reducers you twist, breaking them free from the gasket: Or a rap on the edge of the extension flange with a mallet. Any attempt to pull the headers or extensions away from the gasket and they’ll likely tear. That’s why you barely loosen the bolts so there’s no chance of “pulling” but as is often the case with much, YRMV.